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#1 2013-06-24 22:55:33
- iceman
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- Registered: 2013-04-25
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Searching for a software that calcs the accessbits on Mifare
Does someone have a software which calcs the accessbits for Mifare?
Otherwise I have to write one myself.
So please, send me a link of it if you have it.
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#2 2013-06-24 23:07:19
- asper
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- Registered: 2008-08-24
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Re: Searching for a software that calcs the accessbits on Mifare
http://proxmark.org/forum/viewtopic.php?id=1408
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#3 2013-06-25 08:13:22
- iceman
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Re: Searching for a software that calcs the accessbits on Mifare
Sweet!
I knew I saw somewhere here. Many thanks Asper!
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#4 2013-06-25 13:29:08
- asper
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- Registered: 2008-08-24
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Re: Searching for a software that calcs the accessbits on Mifare
You are welcome, thank you for your testing!
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#5 2013-06-26 10:20:50
- iceman
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Re: Searching for a software that calcs the accessbits on Mifare
Well, I have a hard time understanding the tool.
So I'm thinking of writing a software that "maps" (visually) the memory of an Mifare dumpdata.bin file. With some color coding and editable textboxes, will be more easier to analyze any mifare-datadumps.
Or maybe someone already here have developed such a tool?
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#6 2013-06-26 10:48:16
- asper
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- Registered: 2008-08-24
- Posts: 1,409
Re: Searching for a software that calcs the accessbits on Mifare
It is not difficult to understand: in "decode mode" you put (copy/paste) the access bytes of a sector in the specific box and it tells you what key A and B can do to each of the 4 sector blocks.
On the "code" function you manually select (click) what you want to do with key A and B in each of the 4 blocks and press the code button to obtain access bytes.
It is really simple...
Last edited by asper (2013-06-26 10:48:38)
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#7 2013-06-27 17:27:09
- iceman
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Re: Searching for a software that calcs the accessbits on Mifare
Well, for a stranger to Mifares accessbits it is not so clear as I would like it to be.
However, I'm analyzing the contents of a dump, from a public transportation company's pay-cards. After reading some of the specifications I realized that they (the company) sees a 16b (1block) as a long bit-stream which they divided as fitted. That made me understand and make me shift my focus from a byte-sized world to a bit-size world. And rfid seems be a bit-sized world. Funny.
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